Usually refers to something remote from and invisible to the speaker.
However, éí is often used as a filler word to help smooth the flow of a sentence. It can be used to separate two words that would otherwise seem to be connected. In this sense, éí is often translated as "as for":

Shí ʼéí Tłʼaaí yinishyé. ― As for me, I'm called Lefty; My name is Lefty.